Leaking roofs with a membrane covered concrete slabs can be repaired ,without removing the membrane. In fact the membrane, if still in a fairly good condition, assist us in keeping the pressures such that the porous screed layers below can be penetrated to form a waterproof barrier, even if the seams on the membrane leaks. At the same time, all joints and parapet walls, where applicable, are targeted to offer a fast, efficient, guaranteed result.